Electrodes, secondary batteries, battery packs, vehicles, and stationary power supplies

By optimizing the porosity of electrodes to 70%-90% for current collectors and 60%-80% for the overall electrode, the issue of reduced capacity and performance in secondary batteries is addressed, resulting in high-capacity batteries with enhanced charge-discharge capabilities.

JP7864670B2Active Publication Date: 2026-05-25KK TOSHIBA
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Patent Information

Authority / Receiving Office
JP Ā· JP
Patent Type
Patents
Current Assignee / Owner
KK TOSHIBA
Filing Date
2023-09-20
Publication Date
2026-05-25

AI Technical Summary

Technical Problem

Existing secondary batteries face limitations in increasing capacity due to reduced porosity from thickening electrodes, leading to poor electrolyte impregnation and decreased charge-discharge performance.

Method used

The electrodes are designed with a current collector porosity of 70% to 90% and an overall electrode porosity of 60% to 80%, allowing for deep electrolyte penetration and enhanced reactivity, thereby supporting a high amount of active material for improved charge and discharge performance.

Benefits of technology

This configuration enables high-capacity secondary batteries with excellent charge and discharge performance by maintaining porosity and facilitating effective electrolyte penetration.

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Patent Text Reader

Abstract

To provide an electrode capable of realizing a high-capacity secondary battery having excellent charge / discharge performance, a high-capacity secondary battery and battery pack, and a vehicle and stationary power source equipped with the battery pack.SOLUTION: There are provided a current collector has a first porosity of 70% or more and 90% or less, and an electrode including the current collector and an active material-containing portion and having a second porosity of 60% or more and 80% or less.SELECTED DRAWING: Figure 2
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